Screw-shaving machine.



No. 7l7,l66. Patented Dec. 30, |902.

W. L. CHENEY.

SCREW SHAVING MACHINE.

(Application filed Mar. 11, 1902.|

(No Model.) 2 Sheets-Sheet I.

mmwfix W mumuw y vnlmmm No. 7|7,l66. Patented Dec. 30, |902.

W L CHENEY SCREW SHVING MACHINE.

(Application filed Mar. 11, 1902.'y

2 Sheets-Sheet 2.

(No Model.)

www5-65.

f E' RNIS PETERS PHOT HTMC ASH NGTON D C lUNrrEE STATES ATENT OFFICE.

A'WALTER Il. CHENEY, OF MERIDEN, CONNECTICUT, ASSIGNOR 0F ONE-HALF TO BENJAMIN IIOVARD WARREN, OF PITTSBURG, PENNSYLVANIA.

SCREW-SHAVING MACHINE.

SPECIFICATION forming part of Letters Patent No. '717 ,166, dated December 30, 1902.

Application filed March 11, 1902. Serial No. 97,705. (No model.)

1'0 all 11171/0717/ it may concern,.-

Be it known that I, WALTER L. CHENEY, a citizen of the United States, residing in Meriden, in the county of New Haven and State of 5 Connecticut, have invented certain new and useful Improvements in Screw-Shaving Machines, of which the following is a specification.

This invention relates to machines for shav- Io ing or finishing metal screws and the like; and it consists substantially in the improvements hereinafter more particularly described.

The devices or elements constituting my improvements are so constructed and organized as to be successfully applied to dierent forms of metal-working machines, and more especially to that form or type including an ordinary chuck for holding the work and a carriage upon which is supported a finishing zo or other tool for shaving or otherwise operating upon the work.

My improvements relate more especially to means for supporting and feeding a shaving or other operative or finishing tool for metal i5 screws and the like,as will hereinafter appear.

One of the principal disadvantages or inconveniences attending the use of many former devices or means of this kind results from the fact that too many movements are required 3o to withdraw and advance the chuck and at the same time feed the shaving or other operative tool toward and into engagement with the work. In other Words, the operator is obliged to use one hand for operating the devices or mechanism through the medium of which the movements of the chuck are derived, while with his other hand he actua-tes the mechanism for operating the tool-feed. This renders it very awkward and laborious 4o for the operator and necessarily divides his attention from the work in hand, besides being accompanied by other inconveniencessuch, for instance, as the inability to withdraw the operative tool from the work as quickly as is desired in some instances. The

means or devices hitherto employed for advancing and retracting the chuck have usually consisted of .a simple handlever and clutch and suitable connections, while the 5o shaving or operative tool has in someinstances been mounted upon a carriage operated to be fed transversely of the machine through the medium of a suitable feed actuated and controlled by a separate hand-lever, and so far as I am Vaware the organization has usually been such that the adjustments or alterations of position of the operative tool have been restricted to a comparatively limited eld or range, especially with regard to the angles at which the tool may be brought to bear upon 6o or engage with the work.

The object of the present invention is to overcome all of the disadvantages and inconveniences above pointed out and to provide means whereby the movements of the chuck and the feed for the operative tool may both be effected by a single hand movement or manipulation on the part of the operator and also to provide such means of a simple and reliable character embodying but few parts 7o or elements and capable of beingoperated and controlled with comparatively little effort on the part of the attendant or operator.

A further object of the invention is to provide means whereby the operative tool may be adjusted or set so as to engage with or op erate upon the work at a greater number of angular posit-ions than hitherto, thereby in creasing the capacity of the machine, and also to provide means of the kind referred to 8o which may be readily attached to or detached from the machine Whenever desired.

A still further object of the invention is to* provide means for reducing the expense and labor of the work of shaving or finishing screws and other metal bodies generally and also to enable such Work t0 be performed with greater accuracy and with a considerable saving of time as compared with other organizations or embodiments of devices hith- 9o erto devised with similar ends in View.

The above and additional objects I attain by means substantially such as I have illustrated in the accompanying drawings, in which 95 Figure 1 is a top plan view of a metal-working machine in which my improvements are embodied, and Fig. 2 is a front elevation thereof. Fig. 3 is a transverse sectional view showing the organization of elements more roo clearly, and Fig. 4 is a part-sectional detail View showing the devices for eecting engagement and disengagement between the cam on the actuating or operating shaft and the lever or other connection through the instrumentality of which the chuck is moved back and forth or actuated. Fig. 5 is a detail view in perspective of the movable block or slide constituting one of the elements of the means constituting my improvements and also constituting the direct support for the adjustable tool holder or stock. Fig. 6 is a similar View ofthe adjustable guide in which the movable block or slide works. Fig. 7 is a similar view of the base or table upon which the movable block and the adjustable guide therefor are mounted or supported, said base or table being constructed also to constitute a guide for the devices for effecting the feed of the operative tool or implement to the work operated upon. Fig. 8 is a detail view in perspective, showing the construction of cam more clearly.

Specific reference being had to the accompanying drawings by the designating characters marked thereon, A represents in entirety an ordinary lathe or metal-working ma-v chine of conventional type orform, said machine comprising a supporting frame A2, upon which is mounted at one end a supplemental frame B for the direct support of an ordinary lathe-chuck or work-holder C, having the usual mandrel and pulleys thereon for driving or rotating said chuck. The general construction and arrangement of the chuck or work-holder is well known. Hence no specific reference thereto is necessary for the purposes of my present invention. It may be stated, however, that the same may be of that type which when retracted enables thework held thereby to be readily removed and which when advanced or moved inwardly takes a firm hold on the work, as in the manner of a clamp. The work held by the chuck is designated at ct and may consist of a screw or other metal body which is to be shaved off or otherwise dressed or finished by the action of the shaving or other operative tool, and the mandrel b of said chuck is provided at a point beyond the supplemental frame B with a grooved collar c, which is engaged by a forked clutch or yoke d, which is movably or slidably mounted upon a short rod or shaft e, projecting from one end of the said frame B, as shown more clearly in Fig. 2. Said clutch or yoke d is movably engaged in any suitable manner by a hand-lever D, one end ot' which is pivotally or movably supported atf by means of a projection from the frame A2, and by carrying said hand-lever away from and toward the end of the machine it is obvious that the said chuck O will be correspondingly actuated or moved. The construction and` organization of the chuck-operating devices as thus far described do not differ in any essential rerpect from the means ordinarily employed for such purpose in similar connections; but I utilize the said hand-lever D in connection with my improvements in the manner and for the purpose hereinafter more fully understood. Located at the .opposite end of the machine is an ordinary rotary turret E, mounted tov be moved toward and away from the chuck C on suitable pairs of guide-rails 1 and 2, arranged or located longitudinally of the upper surface of the frame of the machine, (see Figs. 1 and 3,) said turret being provided with a series of differently-constructed radially-projecting operatingtools in the usual manner. Also mounted upon the said pairs of guide-rails 1 and 2, intermediate the chuck and turret, is a hase or table Gr, grooved on its under side at 3 'and 4 to iit said rails and provided also on its under side with a downwardly-projecting arm or screw-rod 5, upon which is fitted a clamping-bow 6, notched or otherwise constructed at the ends thereof to engage projecting shoulders or edges 7 7, formed on the inner side of the frame of the machine, and screwing upon the end of said screw-rod 5 is a nut 8, provided with radiallyprojecting members 9 to enable the same to be turned by hand. From this construction it will be seen that by loosening the said nut 8 the base or table may be moved or adjusted in either direction, whereupon the same may be securely fastened in place by screwing up the said nut, the coperation of the severallyenumerated elements or members furnishing an effective clamp for this purpose. The said base or table also in part constitutes a guide for the feed devices for the slide upon which the shaving or other operative tool is mounted, and for this purpose it is constructed in the under surface thereof with substantially a T-shaped groove 1Q, extending for a part of its length. Located in said groove and movble back and forth therein is a rack-bar 12, corresponding to the shape of the groove and formed on its under surface with a series of teeth 13, which mesh with or are engaged by the teeth 14 of a pinion 15, carried by or mounted upon an operating-shaft M, having its central support in a bearing 16, formed with or secured by means of screws 13 to the base or table G at its adjacent end, and which operating-shaft is also supported by additional bearings 17, 18, an,d 19, projecting from the adjacent side of the framework A2 of the machine, as shown in Figs. 1 and 2. The said operating-shaft M is provided at a convenient point with a hand-lever M', and at the end thereof at which the hand-lever D is located it is also provided with a cam N, normally occupying practically an upstanding position and having in the operative face 20 thereof a specially-curved groove 2l, in

which works the end of a spring-actuated pin or bolt 22, enlarged to form a shoulder 23, and working in an opening 24 in a boss or offset 25, formed on the said hand-lever D, the said pin or bolt being provided with a lateral projection 26 and having a spring thereon exerting its tension between the shoulder 23 and the under side of a screw-cap 27,screw- IOO IOS

ing upon the upper end of said boss or offset l 25. (See detail Fig. 4.) The construction or shape of the groove 2l in cam Nis such that on operating the rod M the chuck C Will be moved in an obvious manner. Should it be desired to effect such movement by the handlever D independently of the rod M and cam N, disengagement of said lever D maybe effected by simply drawing the pin or bolt 22 upwardly until clear of the cam-groove 2l and then turning said pin to cause the lateral projection 26 thereof to rest upon the upper surface of the screw-cap 27, the edge of the opening in the latter being notched at 27L to permit such raising of the said pin or bolt.

The base or table G is also formed with a circular recess 30, and in the bottom or under side thereof is an oblong opening or slot 3l, extending lengthwise of said base or table, and the latter is also provided with oppositely-disposed arc slots 32 and 33, concentric with and on opposite sides of said circular recess 30, the said arc slots being cut or formed all the way through the base or table, as shown, the one marked 32 crossing and communicating with the groove 10, but for no special purpose in this respect. Fitted or screwing into rack-bar l2 at or near the inner end thereof is a pin or post 35, which extends upwardly through the slot 3l and circular recess 30 of base or table G and also through a circular opening 36, formed in a plate N3, which is provided on its underside at such opening with a flange 38 lo fit said recess, the said opening and recess coinciding with each other and being of the same diameter. The said plate is formed on its upper surface, at the longer edges or sides thereof, with lianges 40 40, the inner surfaces of which are beveled or undercut at 4l to receive correspondingly shaped tongues or flanges 42 42, formed at the longer edges or sides of a slide S, (about to oe described,) and thus said plate becomes a guide-plate for said slide. The said plate NS is also formed on opposite sides of the opening therein with oppositely-disposed arc slots 45 45, which are concentric with such opening and which register with the arc slots 32 and 33 in the base or table G. Fitting in each of the said slots of said base or table is a nut 48, and fitting in each of the said slots of the guide-plate isl a recessed block 49, and passing through an opening in each of said blocks and screwing into each of said nuts is a screw 50, the heads of which are flush with the blocks, as shown. By loosening said screws the guide-plate N3 may be adjusted axially in either direction upon the base or table G, as is apparent, and then by again tightening the screws the said plate will be secured firmlyin the position to which it may be turned. It will also be apparent that in virtue of the coinciding or registering arc slots in said base and plate the latter is adjustable over a wide field or range.

It should be remarked that the edges of the slots 45 45 in the guide-plate are preferably rabbeted at 55, Fig. l, so as to form seats for the blocks 49, whereby the latter effectnally hold or bind the guide-plate when the screws 50 are tightened. Said blocks are also iush with the upper surface of said plate, as shown.

The slide S, in addition to having the beveled tongues 42 42 at the longer sides or edges thereof, is also formed at or near each end with a transverse groove 60, the sides of which are of a re'entrant character, as shown at l, and fitting in each of said grooves is the base of a tool holder or support 65, which is constructed to accurately fit said grooves 60. Each tool holder or support is provided with a collar or ring 66, resting upon the upper surface of the slide, and the said holder orsupport is also slotted transversely at 67`for the passage therethrough of the shaving or other operative tool 68. Working in a threaded opening in the upper end of the holder or support is a screw 69, the inner end of which bears more or less tightly upon the upper edge of the tool, and thus it Will be seen that the tool is firmly held in position. Said tool holders or supports may be rotated to bring the tool at any desired angle with reference to the work to be operated upon, and they may also be moved or adjusted lengthwise of the said groove 60 or transversely of the slide. When these adjustments of the said tools are considered in connection with the adjustments of the guide-plate already referred to, the increased capacity of my improvements becomes more apparent. Centrally of the said transverse grooves 60 60 the said movable block or slide S is formed on its under side with a parallel groove 75, in which is received a block 76, litted upon the upper end of the pin or post 35, projecting upwardly from the inner end of the rackbar 12, and thus it will be seen that when said rack-bar is caused to move outwardly the pressure exerted by block 76 against the side of said groove will cause the said slide S to move within or upon the guide-plate N3, and in this way is the tool fed to and held in engagement with the work to be operated upon. The said rack-bar is given the necessary feed motion through engagement therewith of the pinion l5, which is turned with the operating rod orshaft M on pressing downwardly upon the hand-lever M'. In this way I am enabled to effect the operation of both the chuck and the feed devices for the operating-tool from the samesource and by mechanism capable of being actuated and fully controlled by the operator with less laborand in less time than has hitherto been accomplishable With many devices or mechanisms devised for the execution of similar work. By reversing the movement of the operating rod or shaft the tool will be quickly drawn away from the work, and it is evident that many advantages are derived from a con- IOO IIO

IZO

struction and organization of elements such as I have herein shown as illustrative of my invention.

As before stated, I am 'not limited in practice to the precise details of such elements herein specified or pointed out.

Having described my invention, `I claim- 1. In a metal-working machine, the combination with a chuck or work-holder, of a base formed in its under side with a groove and in its upper surface with a recess having in its bottom a slot communicating with said groove, a guide-plate having means rotatably fitted in said recess and formed with an opening communicating With said slot, a slide working on the guide-plate, a movable rack in the groove of the base, means on said rack having movable connection with the slide, and means for operating the rack.

2. In a metal-working machine, the combination with a chuck or work-holder, of a base formed in its under side with a groove and in its upper surface with a recess having in its bottom a slot communicating` with said groove, a guide-plate having means rotatably fitted in said recess and formed with an opening communicating with said slot, means for securing said guide-plate in different angular positions with respect to the base, a slide working on the guide-plate and a tool-holder supported thereon, a movable rack in the groove of the base, means on said rack having movable connection with the slide, hand mechanism for operating said rack, and intermediate connections whereby the chuck is operated with each movement of the rack.

3. In a metal-working machine, the combination with a chuck or work-holder, of a base formed in its under side with a groove and in its upper surface with a recess having in its bottom a slot communicating with said groove, a guide-plate having means rotatably fitted in said recess and formed with an opening communicating with said slot, means securing the guide-plate in different angular positions with respect to the base, a slide working on the guide-plate and supporting a tool-holder, said slide having in its under side a transverse groove, a movable rack in the groove of the base, means on said rack supporting a block slidably fitting the groove of the slide, and means for operating said chuck and said rack from the same source of motion. y 4. In a metal-working machine, the combination with a chuck or work-holder, of a base formed in its under side with a groove and in its upper surface with a recess having in its bottom a slot communicating with said groove, a guide-plate having means rotatably fitted in said recess and formed with an opening communicating with said slot, said base and guide-plate having coinciding arc slots with means therein for securing the guideplate in different angular positions with respect to the base, said means comprising nuts and blocks and tightening-screws therefor, a slide working on the guide-plate and supporting a tool-holder, said slide having in its under side a ltransverse groove, a movable rack in the groove of the base, means on said rack supporting a block slidably fitting the groove of the slide, and means for operating said chuck and rack from the same source of motion.

5. In a metal-working machine, thevcombination with a chuck or work-holder, of a base formed in its under side with a groove and in in its upper surface with a recess having in its bottom a slot communicating with said groove, a guide-plate having means rotatably fitted in said recess and provided with an opening communicating with said slot, means for securing said guide-plate in different angular positions with respect to the base, a slide working on the guide-plate, said slide having in its under side a transverse groove and formed in its upper surface with parallel grooves, rotatable tool-holders slidably supported in said parallel grooves, a movable rack in the groove of the base, means on said. rack supporting a block slidably fitting the under groove of the slide, and means for operating said chuck and said rack from the same source of motion.

6. In a metal-working machine, the combination of a movable chuck or work-holder, and a lever movably connected therewitl1,'a base, a guide-plate having angular adjustments thereon, a slide working on the guideplate, a tool-holder adjustable on the slide, a rack having movable connection with the slide, a movable rod having a hand-lever and provided with a pinion engaging the rack and provided at one end with a cam having a groove, and a spring-actuated engaging pin supported by the lever first named and engaging in said cam-groove.

7. In a metal-working machine, the combination of a movable chuck or work-holder, and a lever movably connected therewith, an adjustable base formed in its under side with a groove and in its upper surface with a circular recess having in its bottom a slot communicating with said groove, a guide-plate formed with a circular opening coinciding with said recess and communicating with said slot, said guide-plate being provided at the lower edge of such opening with a ange rotatably fitting said recess, means for securing the guide-plate in dierent angular positions with respect to the base, a slide on the guideplate, a rack in the groove of the base, means on the rack having movable connection with the slide, a movable rod havingahand-lever and provided with a pinion engaging the rack and provided at one end with a cam having a groove, and a spring-actuated engaging pin supported by the lever first named and e/ngaging in said cam-groove.

8. In a metal-working machine, the combination of a movable chuck or work-holder, and a lever in movable connection therewith, a tool for operating upon the work, means for feeding the tool to the work, a rack for oper- IOO ating such means, a movable rod having a hand-lever and provided with a pinion engagl ing the rack, and movable connection be` tween said rod and lever first named whereby the chuck is operated with the rack.

9. In a metal-Working machine, the combination of a movable chuck or Work-holder, and a lever in movable connection therewith, a tool for operating upon the work, means for feeding the tool to the Work, a rack for operating such means, a movable rod having a hand-lever and provided with a pinion engaging the rack, and movable con nections between one end of said rod and the lever first named whereby the ehuek is operated with the rack, said connections being separable as and for the purpose set forth.

VALTER L. CHENEY.

Witnesses:

FRED. J. Donn, EDWARD E. ELLIS. 

